Honeywell BACnet Data Sheet

31-00096-02

BACnet® Fixed Function Thermostat

FOR FAN COIL/HEAT PUMP/CONVENTIONAL SYSTEMS

SPECIFICATION DATA

FEATURES

• 19 pre-loaded applications for a quick, out-of-the­box solution.

• Optional integrated wireless receiver saves wiring
time and costs, provides more location options.

• Internal temperature and humidity sensors, 3
universal inputs, 6 relay outputs, 2 analog outputs.

• BACnet-compliant on MS/TP LAN at up to 76.8 Kbps
with an internal DDC logic loop of 100 msec.

• A configurable device that is capable of stand-alone
or integrated operation.

• Sleek sophisticated design with touch screen display
with dual setpoints.

APPLICATION

The BACnet Fixed Function (BACnet FF) thermostats are
configurable devices with 19 factory-loaded applications
for specific and common projects including fan coil, heat
pump and roof top equipment control.

The BACnet FF thermostats come in two models, the
standard TB3026B and the wireless enabled TB3026B-W.
Each model is a communicating, intelligent sensor­controller combination with built-in temperature and
humidity sensors used to control the pre-loaded
applications. They provide a cost effective solution for
occupancy and crowd monitoring in hotel rooms,
conference rooms, schools, office buildings and more. The
large, easy-to-see display and easy-to-use interface
allows for the complexity of direct digital control (DDC) in
a user friendly package.

The BACnet FF thermostats communicate over an MS/TP
LAN so each device operates as a fully functioning BACnet
controller while easily integrating with the building
automation system. These devices are configured using
the Niagara Framework® software where a configuration
wizard will enable an intuitive setup.

DESCRIPTION

The BACnet FF thermostats are available in two models, as
described in Table 1.

Table 1. Thermostat Configurations.

Thermostat

Model

TB3026B 3 2 6 NO

TB3026B-W 3 2 6 YES

Both thermostat models are configurable and come with
19 factory-loaded applications. The TB3026B-W includes
an integral wireless receiver providing compatibility with
wireless occupancy sensors.

UI

(Universal

Input)

Equipment Control Options

• 2-Pipe Fan Coil, 4-Pipe Fan Coil, Water/Air Source Heat
Pump, Roof Top Unit

• On/Off, Three Speed or VFD Controlled Fan

• Floating, Two-Position or Analog Cooling/Heating
Valve Control

• On/Off Compressor and Heating Stages

• Floating or Analog Economizer Control

• Space, Outdoor or Supply Air Remote Sensors

AO
(Analog
Output)

DO

(Relay

Output)

Integrated

Wireless
Receiver

FOR FAN COIL/HEAT PUMP/CONVENTIONAL SYSTEMS

WARNING

SPECIFICATIONS

Power

24VAC power from a UL Listed Class-2 24VAC transformer

(not provided). The BACnet FF uses a half-wave rectifier
to convert the AC power supply to onboard power. This
enables multiple devices with half-wave power supplies
to be powered from a single, grounded transformer.

Half wave devices and full wave devices must not
use the same AC transformer.

You must maintain wiring polarity. Failure to do so
can result in equipment damage.

If the HVAC equipment has an internal circuit board
that is powered by the same transformer that will
power the BACnet FF, verify that it is NOT full wave.

Min. Load = 17VA (all BOs OFF).

Max. Load = 89VA (all BOs ON).

If BO power jumper is not removed, then all BOs are pow-

ered from the controller’s transformer.

Minimum load includes controller and analog outputs at

full load (20mA into 500 Ohms).

All BOs are N.O. (Normally Open) contacts with a maximum

switch rating of 24VAC @ 0.5A (12VA).

Maximum load assumes all 6 relay output loads are pow-

ered from the controller transformer and connected
loads are the maximum allowed (24VAC @ 0.5A). Actual
power requirements depend on connected loads.

Wireless Receiver (TB3026B-W only)

433.92 Mhz; range is 50 feet.

Inputs

3 universal inputs with 12-bit accuracy, providing con-

trolled voltage, current and resistive modes. Requires a
10k type 2 thermistor when using remote sensors.

Internal Sensors

1 internal temperature sensor, 0–120 deg. F (-17.8–48.9

deg. C); 1 internal humidity, 5–95% RH, non-condens­ing.

Relay Outputs

6 relay outputs; normally open contacts with a maximum

switch rating of 24VAC @ 0.5A (12VA). BO-0, BO-2 and
BO-5 are powered from the controller transformer. BO­1, BO-3 and BO-4 are powered from control transformer
through removable jumper, allowing these BOs to be
powered from a separate power source.

Universal Analog Outputs

2 outputs with 12-bit resolution. Each auto-detects for 0–

10VDC or 4–20mA. 4–20mA outputs are sourced by the
BACnet FF. Connected loads must return to the
BACnet FF ground. The BACnet FF automatically
switches from 0–10V mode to 4–20mA current mode
when it detects a load value of less than 500 Ohms.

Processor & Memory

Powerful 32-bit processor with extensive flash memory

and RAM resources. Flash memory provides nonvolatile
program and data storage, and allows for encrypted
updates to the program for future product enhance­ments.

Environmental

Residential, commercial and light-industrial environments.

0–120 deg. F (-17–49 deg. C). 0–95% RH, non-con­densing.

Communications

BACnet MS/TP LAN up to 76.8Kbps.

Ratings

Listed Temperature Sensing Controls for US and Canada

(XACX, XACX7 under UL 60730-2-9, CSA C22.2
No. 60730-2-9, File E481079.

EMC Directive (European CE Mark) EN 60950

(TB30326B-W model only).

This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause
harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television reception, which
can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by
one or more of the following measures:
— Reorient or relocate the receiving antenna.
— Increase the separation between the equipment and

receiver.

— Connect the equipment into an outlet on a circuit

different from that to which the receiver is connected.

This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and (2)
this device must accept any interference received,
including interference that may cause undesired
operation.

This Class B digital apparatus complies with Canadian
ICES-003.

This device complies with Industry Canada license-exempt
RSS standard(s). Operation is subject to the following two
conditions: (1) this device may not cause interference, and
(2) this device must accept any interference, including
interference that may cause undesired operation of the
device.

Communications

Each device uses a BACnet MS/TP communications port.
The device’s data is presented to other devices over a
twisted-pair MS/TP network, which uses the EIA-485
signaling standard capable of the following baud rates: 9.6,

19.2, 38.4, or 76.8 kilobits per second (configured at global
controller). The BACnet FFs are master devices on the

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